As I was driving down highway 89 between Ogden and Salt Lake City, I decided to take a short cut through a rural neighborhood. I reached a dead end and was forced to go back to the main highway. I saw a cow in a corral and decided to stop and look at the cow and granary, as I think that skeleton architecture and pastures in residential areas are a very quaint phenomenon of the Mormon landscape. As I was looking at the granary and the cow, I saw a shadow move swiftly from my left side to behind me. A feeling of dread came over me and I got a strong feeling that I should leave. I always listen to my instincts, so returned to my car immediately. As I began to drive away, a strong feeling of dread washed over me. It was so strong I could cut it with a knife. I looked behind me and was surprised to see an orb of light in my rearview mirror. The light was about the size of a small cantaloupe, suspended in the air about 4ft high. I saw nothing but the light that wa! s rushing towards the back of my car. It looked something like a bicycle headlamp from my rearview mirror, so I assumed someone wanted to talk to me to see what I was doing. They were probably bothered by my presence or suspicious of me looking at their property. Looking in the mirror, I saw it was about 5 ft behind me before it veered slightly to the left side of my car. I stopped my car, rolled down my window, and was going to greet the person on the bike with the large bright headlamp. I then looked over my left shoulder to talk to them and there was nothing there. By the angle of the swerve and speed of the light was traveling, by the time I looked left to greet them, it should have been at my left rear fender and taken another second or two to be at my window. But by the time it took me to look from my rearview mirror to over my left shoulder the orb of light vanished! I opened my door, got out, and looked around at disbelief that it had vanished into thin air. Again,! I was overcome with a very malevolent feeling, got back in my! car, an d drove away as fast as I could. No light followed me as I drove away for the second time.